Misc Improvements (#7)

* get rid of optional<ptr> -> double indirection * more optional cleanup * fix * add more render pixel type options * towards different views * missing virtual declaration of ShowImage * fix runtime * init image view factory * fix build Render Image close button re-enable add readme init documentation use awesomeDoxygen ci build docs install doxygen id token permission add pages write permission
2025-09-23 21:57:08 +02:00
parent 0be064bb8e
commit 235d00192a
34 changed files with 418 additions and 173 deletions
@@ -0,0 +1,77 @@
+#include "PixelariumImageViewDefault.hpp"
+
+#include <format>
+
+#include "imaging/IPixelariumImage.hpp"
+#include "imgui.h"
+
+/// @brief Checks if the dimensions of two ImVec2 vectors have changed significantly.
+/// @param ref_rect The reference ImVec2 vector.
+/// @param new_rect The new ImVec2 vector to compare against.
+/// @return True if the absolute difference between the y-coordinates is greater than 5 or the x-coordinates are
+/// different; otherwise, false.
+static bool dim_changed_p(const ImVec2& ref_rect, const ImVec2& new_rect)
+{
+    if (std::abs(ref_rect.y - new_rect.y) > 5 || std::abs(ref_rect.x - new_rect.x))
+    {
+        return true;
+    }
+
+    return false;
+}
+
+/// @brief Calculates dimensions to maintain aspect ratio.
+/// @param img The input image.
+/// @param curr_dim The current dimensions.
+/// @return The calculated dimensions maintaining aspect ratio.
+ImVec2 aspect_const_dimensions(const ImVec2& raw_dim, const ImVec2& curr_dim)
+{
+    const auto w_fact = (curr_dim.x / raw_dim.x);
+    const auto h_fact = (curr_dim.y / raw_dim.y);
+
+    const auto fact = w_fact < h_fact ? w_fact : h_fact;
+
+    return ImVec2(raw_dim.x * fact, raw_dim.y * fact);
+}
+
+/// @brief Displays the image in an ImGui window.
+///
+/// If the image is null, empty, or has an empty name, the function returns immediately.  Otherwise, it creates an ImGui
+/// window with a horizontal scrollbar and menu bar. The image is rendered using the CvMatRender object, resizing it to
+/// fit the available window space.  The raw and rendered dimensions are displayed below the image.
+void pixelarium::render::PixelariumImageViewDefault::ShowImage()
+{
+    if (!this->cached_image_ || this->is_dirty_)
+    {
+        this->cached_image_ = this->img_->TryGetImage();
+        this->is_dirty_ = false;
+    }
+
+    if (this->img_->Empty() || this->img_->type_ == imaging::ImageFileType::UNKNOWN || !cached_image_ || this->img_->Name().empty())
+    {
+        // do nothing
+        return;
+    }
+
+    ImGui::Begin(this->img_->Name().c_str(), &this->open_p, ImGuiWindowFlags_HorizontalScrollbar | ImGuiWindowFlags_MenuBar);
+
+    this->curr_dim_ = ImGui::GetContentRegionAvail();
+    auto new_dim = ImGui::GetContentRegionAvail();
+    auto texture =
+        dim_changed_p(this->curr_dim_, new_dim)
+            ? this->render_.Render(static_cast<size_t>(this->curr_dim_.x), static_cast<size_t>(this->curr_dim_.y))
+            : this->render_.Render();
+
+    this->curr_dim_ = new_dim;
+
+    ImVec2 dim(cached_image_->cols, cached_image_->rows);
+
+    ImGui::Image(reinterpret_cast<ImTextureID>(reinterpret_cast<void*>(texture)),
+                 aspect_const_dimensions(dim, new_dim));
+
+    ImGui::Separator();
+    ImGui::Text("%s", std::format("   Raw Dimensions W : {}, H: {}", dim.x, dim.y).c_str());
+    ImGui::Text("%s", std::format("Render Dimensions W : {}, H: {}", curr_dim_.x, curr_dim_.y).c_str());
+
+    ImGui::End();
+}